The alkali metals have:

1. highest ionization energy

2. largest atomic radii

3. highest density

4. highest electronegativity

Subtopic:  Modern Periodic Table & Periodicity |
 73%
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The telluric helix was given by:

1. Newland

2. Mendeleev

3. Lothar Meyer

4. De-chancourtois

Subtopic:   Evolution of Periodic Table |
 64%
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The element with atomic number 30 is expected to be present in:

1. IB group

2. IA group

3. IIA group

4. IIB group 

Subtopic:  Electronic Configuration |
 75%
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The correct order of acid strength is:

1. Cl2O7>SO2>P4O10

2. CO2>N2O5>SO3

3. Na2O>MgO>Al2O3

4. K2O>CaO>MgO

Subtopic:  Nature of Compound |
 79%
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Which among the following elements is the bridge element?

1. K

2. O

3. Mg

4. Pb

Subtopic:  Modern Periodic Table & Periodicity |
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Four successive members of the first-row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

1. Vanadium (Z = 23)

2. Chromium (Z = 24)

3. Iron (Z = 26)

4. Manganese (Z = 25)

Subtopic:  Ionization Energy (IE) |
 55%
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Transition elements show:

1. variable valency

2. paramagnetism

3. catalytic properties

4. all of these

Subtopic:  Modern Periodic Table & Periodicity |
 93%
From NCERT
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The transition elements are more metallic than the representative elements because they have:

1. The electrons in d-orbitals

2. Electron pairs in d-orbitals

3. Availability of d-orbitals for bonding

4. Unpaired electrons in metallic orbitals

Subtopic:  Modern Periodic Table & Periodicity |
 61%
From NCERT
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Which pair has elements containing a same number of electrons in the outermost orbit?

1. N, O

2. Na, Ca

3. As, Bi

4. Pb, Sb

Subtopic:  Electronic Configuration |
 80%
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The correct arrangement of increasing order of atomic radius among Na, K, Mg and Rb is 

1. Mg<K<Na<Rb

2. Mg<Na<K<Rb

3. Mg<Na<Rb<K

4. Na<K<Rb<Mg

Subtopic:  Atomic Size |
 83%
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